//弹窗的样式
#mask{
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 10vh;
    background: #fff;
    z-index: 9999999;
    display:none;
}
.maskContent{
    width: 40vw;
    height: 350px;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    background: #fff;
}